Math Antics
Circles, Circumference and Area
Put pi to work. The video provides the formulas for the circumference and area of circles. Using the formulas, the presenter shows how to distinguish the two using units. The discussion leads to the second formula for finding the...
Curated OER
Circumference by Math Busters
The Math Buster goes out and demonstrates a real life example of calculating circumference by walking around the edge of a circle, and compares it to walking from the edge of the circle to the center point. It is a visual demonstration,...
Curated OER
What is the Formula for the Area of a Circle?
Cut up a circle and make a parallelogram! What? No way! Yes way! Watch the instructor illustrate just how to cut up the circle and get that parallelogram to then get the formula for the area of a circle. It really works! Base,...
Curated OER
What is a Cylinder?
Follow along as the instructor explains what makes a solid shape a cylinder. Yes, learning the meaning of these terms: cylinder, base, curved side, curved face, congruent bases, solid, three dimensional, area, circumference, parallel,...
Curated OER
What is a Cylinder?
Follow along as the instructor explains what makes a solid shape a cylinder. Yes, learning the meaning of these terms: cylinder, base, curved side, curved face, congruent bases, solid, three dimensional, area, circumference, parallel,...
Corbett Maths
Circumference
Circumference and diameter differ by just a factor of pi. A short video shows viewers how to calculate circumference given the diameter. It also gives an example of determining the diameter given the circumference.
Curated OER
What is a Sphere?
The teacher diagrams and explains the different terms of what comprises a sphere. Follow along and learn about the: radius, diameter, great circle, center, hemisphere
Curated OER
What is a Sphere?
The teacher diagrams and explains the different terms of what comprises a sphere. Follow along and learn about the: radius, diameter, great circle, center, and hemisphere.
Corbett Maths
Angles at the Centre and Circumference – Proof
Scholars ponder the proof relating the center angle and circumference using a demonstrative video. Additional worksheets and textbook practice helps them demonstrate their intellect.
PBS
Scale City — Scaling up Recipes and Circles in the Real World
What a great big skillet you have. The resource introduces the class to the world's largest stainless steel skillet. The class creates a model of the skillet and a typical 12-inch skillet and compares the relative sizes of their areas....
Corbett Maths
Perimeter of a Semi-Circle
Surround yourself with knowledge about perimeter. An informative video shows viewers how to find the perimeter of a semicircle. It begins with an explanation of calculating the length of the semicircular arc and ends with adding on the...
Curated OER
STEMbite: Circumference Mystery
Middle school mathematicians might be able to follow as Mr. Vander Heuvel explores the relationship between circumference and diameter. The mystery comes in when he uncovers that for every increased increment of one unit in diameter, the...
Corbett Maths
Parts of the Circle
Before you can do anything with circles, you need to know the parts of the circle. Viewers of a short video see how to label relevant information about a circle. The resource covers radius, diameter, circumference, chord, tangent, arc,...
Khan Academy
SAT Prep: Test 8 Section 2 Part 1
Test eight from The Official SAT Study Guide includes eighteen problems, the first four of which are featured in this video. Basic algebraic expressions, linear equations, tangent circles, and coordinates on a plane test algebra and...
Khan Academy
SAT Prep: Test 7 Section 5 Part 2
Complicated word problems and expressions are no match for Sal, and after watching this series, they will be no match for your students either! Sal deftly handles problems involving algebraic equations, averages, and circumference.
Curated OER
How Do You Find the Lateral and Surface Areas of a Cylinder?
There are three formulas that need to be used to solve this problem. The formula for the lateral area of a cylinder, the formula for the circular base of the cylinder, and then the formula for the surface area. It seems like quite a bit,...
Khan Academy
SAT Prep: Test 3 Section 2 Part 3
Math speeds along in this video, which takes students through problems 11-15 on the practice SAT. Sal takes care to show students more than one possible way to solve several problems, allowing them to make the choice based on their own...
Numberphile
Calculating Pi with Real Pies
Pie is great for finding pi. A short video shows how to use real pies to calculate pi. The method involves laying out pies along the circumference and along the diameter of a circle, and then finding the ratio of the number of pies.
Khan Academy
SAT Prep: Test 6 Section 7 Part 5
On the home stretch of this practice session, Sal completes problems 18 and 19 on page 738 of The Official SAT Study Guide. He begins problem 20, but chooses to finish it in the next video instead of rushing the answer. As always, Sal's...
Khan Academy
SAT Prep: Test 7 Section 5 Part 4
Transitioning between algebra and geometry is no problem for Sal as he deftly solves these practice SAT problems. Mathematicians who have a hard time moving between skill sets will appreciate the way that Sal addresses each new problem...
Khan Academy
SAT Prep: Test 1 Section 3 Part 4
Pushing through to problems 11-12 on page 398 of The Official SAT Study Guide, Sal goes into comprehensive detail on each problem. Problem 11 involves geometry, including the function of pi, and problem 12 involves non-constant slopes....
Flipped Math
Unit 9 Review: Area of Polygons
It's time to show what you know! Individuals first review finding the area of polygons using the formulas from parallelograms to regular polygons. They then brush up on finding the area and circumference of circles, as well as reviewing...
Krista King Math
Arc Length
Don't let your classes feel like they are going in circles. The video lesson shows pupils how to apply a formula to finding the length of an arc defined along a circle. The instructor uses three different examples to illustrate the...
Curated OER
MTEL Math Practice Test: 31-35
Applying algebra and geometry skills, a set of problems tests the viewer with questions about area, radius, and proportions. An excellent review for even the most confident future math teacher, the video is sure to help with the correct...
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